CVE-2026-44459 — Hono: Improper validation of NumericDate claims (exp, nbf, iat) in JWT verify()

Description (CNA)

Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.18, improper validation of the JWT NumericDate claims exp, nbf, and iat in hono/utils/jwt allows tokens with non-spec-compliant claim values to silently bypass time-based checks. This issue is not exploitable by an anonymous attacker; it only manifests when a malformed claim value reaches verify() — typically when the application itself issues such tokens, or when the signing key is otherwise under attacker control. This vulnerability is fixed in 4.12.18.

Affected (CNA)

Vendor / product	Versions
honojs / hono	affected < 4.12.18

CWE

CWE-1284

References

https://github.com/honojs/hono/security/advisories/GHSA-hm8q-7f3q-5f36

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.